Inaccurate?

Spell Vulnerability

(Spell Compendium, p. 200)

Transmutation
Level: Sorcerer 3, Wizard 3, Cleric 4,
Components: V, S,
Casting Time: 1 round
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature
Duration: 1 minute/level
Saving Throw: Fortitude negates
Spell Resistance: No

A violet spray springs from your fingertips and wraps around your opponent. It fades into a dull purple glow, which attracts spell energies as opposed to shrugging them off.

This spell reduces the subject's spell resistance by 1 per caster level (maximum reduction 15). This reduction can't lower a subject's spell resistance below 0.

Also appears in

  1. Planar Handbook